Bit-stock.



J. MARCUS.

BlT STOCK.

APPLICATION FILED JULY 31.1917.

1 ,272,980. Patented July 16, 1918.

INVENTOR WITNESSES I JQCOb mrclw' 516%? I BY 1 ATTORNEY PATENT FFKQE.

JACOB MARCUS, or aocnns'rna, NEW YORK.

BIT-swoon.

' Specification of Letters Patent.

Patented July 16, 1918.

Application filed :ru1 '31, 1917. Serial No. 183,737.

To all whom it may concern: I

Be it known that I, JAcon MARoUs, acitizen of the United States, residing at Rochester, in the county of Monroe'and State of New York, have invented new and useful Improvements in"Bit-Stoc ks, of which the following is a spe ifica I 7 This invention relates to drills and has particular reference to that class of devices upon which considerable pressure is exerted from the chest of the user during the opera tion of the drill.

The present invention comprehends a sectional drill standard, and interposes between the sections a yieldable means as a cushion for the chest or body of the user, thus providing for the comfort of the latter by decreasing the degree of pressure usually required to be exerted upon the ordinary drill during the operation of the latter.

The nature and advantages of the invention will be better understood when the following detail description is read in connection with the accompanying drawing, the invention residing in the construction, combination and arrangement of parts as claimed.

In the drawing forming part of this specification like numerals of reference indicate similar parts in the several views and where- 1n:

Figure l is an elevation of a drill showing the subject matter of the invention embodied therein.

Fig. 2 is a longitudinal sectional view through the drill standard showing the invention in detail. 7

Fig. 3 is a perspective view of the cupshaped member.

Fig. 4; is a similar view of the thimble.

Referring more particularly to the drawing in detail A indicates generally a drill of the class to which the present invention relates, although the construction and operating mechanism of the drill, aside from the standard does not form the subject matter of my invention.

In accordance with the present invention the drill standard consists of two sections 10 and 11 respectively, the latter being hollowed out for a portion of its length to slidably receive the section 11. Rising centrally from the solid end portion of the section 10 is a pin 12 which is threaded adjacent its extremity as at 13. The section 11 is hollow and internally threaded adjacent its lower end as at 14 to accommodate the cup-shaped element 15 which is externally threaded. The cup-shaped element may be constructed from any suitable material, with its bottom 16 provided with a central opening 17 for the reception of the pin 12, upon which the cup-shaped element 15 and the section 11 are slidably mounted as a unit. The edge of the opening 16 is bent upwardly to provide a collar 18 which serves to guide the cupshaped element in its movements. The bottom 16 of the cup-shaped element is further stamped to provide hook-like elements 19 projecting within the cup-shaped element. and adapted to hook over the adjacent convolution of a coil spring 20 which encircles the pin 12. Manifestly in this manner the cup-shaped element and section 11 are yieldably supported by the spring 20, it being of course understood that the opposite end of the spring is fixed upon the pin 12. For this purpose I preferably employ a thimble 21 which is threaded upon the threaded extremity of the pin 12, the thimble being formed with a flared or dish-like portion 22 from which is stamped a plurality of inwardly extending hook-like elements 23 which engage the adjacent convolution of the coil spring 20.

It will thus be observed that the section 10 of the standard is stationary, while the section 11 is relatively movable within the section 10, and yieldably supported by the spring 20. Manifestly when the operators chest is brought to bear upon the saddle 26, the degree of pressure of the body upon the drill required with drills of ordinary construction, may be materially reduced with a drill constructed in accordance with my invention, while the yieldability of the section 11 adds to the comfort of the user of the drill. The bottom 16 of the cup-shaped element is provided with recesses 27 to accommodate a spanner wrench, or to permit of the use of a needle for the purpose of manipulating the cup-shaped element in threading the latter into the section 11 or removing it therefrom. It will be observed that by adjusting the cup-shaped element 15, to which one end of the spring is connected, the tension of the latter can be regulated.

While it is believed that from the foregoing description the nature and advantages of the invention ill be apparent, I desire to have it understood that what is herein shown and described is merely illustrative of the preferred embodiment of the invention, to which I do not limit myself, and that such changes may be resorted to when desired as fall within the scope of what is claimed.

What is claimed is In a device of the character described, a standard including a fixed section, and a movable section telescopically fittedwithin the fixed section, said movable section being hollow for a portion of its lengthopening at the lower end thereof, and internally threaded, a cup-shaped element threaded within said movable section, a rigid pin rising centrally from within the fixed section and passed through an opening in the cup-shaped element, said p'in having its upper extremity threaded, a second cupshaped element reversely disposed with respect to the first mentioned element and formed to ,provide an internally threaded sleeve portion associated with the threaded extremity of said pin, each of said cupshaped elements being stamped to provide a pair of spaced hooks, and a coil spring surrounding said pin interposed between the said cup-shaped elements, and engaged by said hoops of the respective cup-shaped elements whereby said movable section is yieldably supported within the fixed section. In testimony whereof I aflix my signature. JACOB MARCUS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

